Find the first quartile. (lower quartile)
4, 18, 15, 10, 19, 4,9

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.